Saw



jan;

L. DRAGON SAW Filed Oct. 18, 1923 3 Sheets-Sheet 1 120ml? Page@ jan, 20,

L. DRAGON SAW' Filed Oct. 18, 1923 3 Sheets-Sheet 2 NWN I am. 29,1925.

L. DRAGON sAw s sheets-sheet s Filed Oct. 18.

Patented dan. 26,1925,

EFE@

LOUIS DRAGON, OF PHILADELPHA, PENNSYLVANIA.

` SAW.

To ZZ whom t may concer/n: Figure 17 an enlarged bottom view of Be itknown that I. Louis DRAGON, a sub Figure 16, 55 ject of the King ofGreat Britain. residing Figure 18 a side elevation of my improved atPhiladelphia, in the county of Fhilasaw having the stiffening bracethereon, delphia. and State of Pennsylvania, have Figure 19 a section online 19-19 of invented certain new and useful Improve- Figure 18, mentslin Saws, of which the following is Figure 20 a section on line 20-20 of60 a specification. Figure 18,

My invention relates to saws and its obe Figure 21 an enlargedfragmentary view jects are to provide a saw which will. cut of thehandle shown in Figure 18,

faster, stay sharp longer, will not bind or Figure 22 a section on line22-22 of stick while cutting, may be easily sharpened, Figure 21, 65will always have its teeth accurately set, Figure 23 a modified form ofthe handle and to provide a brace which will reinforce shown in Figure21, and the blade, so that it may be made light, Figure 24 a. section online 24-24 of and adapt it for use. by one man. Figure 23.

These objects, and other advantageous Referring to the drawings, 1indicates 70 ends which will be described hereinafter, a blade which maybe of any curvature I attain in the following manner, reference andwhich has its sides tapering upwardly being had to the accompanyingdrawings in and inwardly from the lower to the upper which edge. Teethare formed in its lower edge Figure 1 is a fragmentary side view of awith their sides in the same plane as the 75 saw blade having teethconstructed in acsides of the blade. The teeth include groups cordancewith my invention, of cutting teeth 2 and 3 and raker teeth Figure 2 abottom view of Figure 1. 4 between the groups. rlhe cutting teeth Figure3 a section on line 2%#3 of Figand raker teeth may be arranged in anyure 1, combination to meet the different require- 80 Figure 4 a crosssection through the cenments, but the construction of the teeth will terof the saw blade, be the same. The cutting teeth 5 of group Figure 5 across section through either 2 converge toward their pointed ends 6 andof its ends, have V-shaped grooves 7 in their opposite Figure 6 afragmentary side view of a edges. Slits 8 are left between the teeth. 85modified form of my invention showing The slits and grooves are closedwith a how the teeth may be made adjustable, filler 9 such as lead,babbitt or other suit- Figure 7 a bottom view of Figure 6. able materialto reinforce` the teeth and Figure 8 a section on line 8-8 ofFigfacilitate sharpening. Cutting teeth 10 of ure 6, groups 3 differfrom teeth 5 in having but 90 `Figure 7 9 a modified form of the teethone cutting face instead of two, the cutting shown in Figure 1,illustrating the same face being provided with a. V-shaped groovearranged for a one-man saw, 11. Thus the grooves 7 of cutting teeth 5Figure 10 a bottom view of Figure 9, produce four cutting edges, whichare par- Figure 11 a Ysection on line 11-11 of ticularly adapted for atwo-man saw, while 95 Figure 9, the grooves 11 of teeth 10 produce buttwo Figure 12 a fragmentary side view, of a cutting edges which areadapted for use blade having a modified form of my inon a one-man sawwhere the cut-ting action vention applied thereto, takes place only onthe forward stroke. The

Figure 13 a bottom view of Figure 12, teeth 10 may be provided with asmall cir- 100 Figure 14 amodiied form of the divergcular groove 12 onthe edge opposite groove ing raker teeth shown in Figure 1, 11 tofacilitate sharpening. 5o Figure 15 L modified form 0f the single Theraker teeth 4 have their raking edges raker teeth shown in Figure 9, 13disposed at an incline to a lateral vertical Figure 16 a modified formof cutting plane perpendicular to the length of the teeth, blade. rlheraker ends 13 are inclined in raker tooth having thekend lfhas a cuttingThe raker teeth 1 arey edge on one side. preferably arranged to divergeas shown in Figure 1, and their shank is provided With an opening 15.rlhe groups 3 ot cutting teeth are integrally connected with the rakerteeth beneath the opening as shownA at 16.'

Then the raker teeth and cutting teeth 10 are Worn to a point adjacentopening 15 the cutting teeth and their integral yconnection 16 may becut out to the opening-,so as to leave a pair otsmall diverging rakerteeth as shown in dot-and-dash lines at 17 inV Figure 1. Any number otthese openings may be provided between the diverging raker teeth andarranged in any manner desired so long as the openings serveV 'to shapethe teeth after the cutting teeth are Worn to their integral connection.The raker Ateeth are spaced from the groups 2 ot cutting teeth toprovide a space 18 t'o'r saw dust to enter. The saw blade 1 is providedwith cut-out parts 19y which communicate with the spaces 18 and receivethe saw dust as it passes vthrough the spaces18. The edges of thecut-out parts are beveled as shown at 20 to allovv'the saw dust, Whichis packed in the cut-out parts during `the cuttingstroke, to' Yfall fromthe cut-out parts after Vthey lea-ve the cut. These beveled edges 20 o1the cut-out parts merge into the' raker teeth having theV-shaped ends14, as shown at 21, and form a continuation of the beveled edges 2OWhere. they meet with the inclined part ot .the tooth having the edge 13as shown at 22. These cut-out parts 1,9, With f. their bevelededges 20,'are especially desirable ivhere a long cut is made as the cut-out partsallow the saw dust to accumulate during the cutting action and thebeveled edges alloiv the saw dust to slip out of the cut-out .partslafter they leave thejcut. The edges 20, as shown in the drawings,are'beveled at one side but may bevbeveled on both sides.

In Figures 6 to 8 of the drawings, I have g shown raker teethlL providedWith an opening 23 tor bindingly ittingcutting teeth 5 so that the rakerteeth l? may be adjusted on the cutting teeth `5a. These raker teeth 4Emay be made ot special hard steel While the cutting teeth may be ofsteel having tough and resilient properties. The raker 'teeth may beadjusted on the cutting teeth by `a specialtool which will fit betweenthe teeth and` struck With a hammer to torcethe teeth up oi dovvn on thecutting teeth. The raker teethlafand cuttingpteeth 5?, are similar toVthose shovvn in Figure 1 and I have there- .fore given correspondingparts similar reteirence characters With the exponent a.

In Figures 9 to 11, I haveshown a combinatioiiol inclined teeth arrangedtor'afoneman saw, thatris the cutting takes place only on the forwardstroke of the savv. T he construction ot V"the raker teeth and cnt-outlparts are similar to that shown in Figure 1,

and I have therefore given corresponding parts similar'referencecharacters With the exponent b. The cutting teeth 10at may be similar tothe cutting teeth 10 shovvn in' Figure 1, that is teeth having twoVcutting edges 'tormed bya tf-shaped groove in .one 1 ot' its edges, ormay have but` one cutting edge as shown at 10b. These teeth 10b have oneedge beveled. group 'ot Vteeth 10b has its beveledA 'edge b h merginginto the beveled edge 20. Vont e cut-out parts 191.

In Figures 12 and 13,-Ihave shown the:

'The end tooth ot each..`

blade o't'the sanv provided Withslits Seasiinilar Yto the slits 8 shownin`Figure `1 and.

teeth formed on theblade between the` slits. Y

The teeth may-be 'similar to the ordinary.

hand saw teeth which are bent to one side and then to the other when settor cutting. The slit is closed. 1vvith .a filler 9? ot' lead, babbittor other material.

teeth by providii'ig a sott.` material Where the corner ot' the vtilecuts.

In Figure" 14, I have shown thev rakei' teeth 4 ot Figure 1asstraightinstead ot diverging as indicated `by do't-anddaslr tage ofraking the saw dust on both of its` sides. during the 'forward andstroke of the'saw.

In Figures 16 'and 17,

rearward rounded. edges..24. These edges Yinay'be rounded at bothVcorners of theedge of the tooth or 'one corner a's shown in Figure'17.V The advantage of a toothof this typefis These' slits andy thefiller facili-tate the sharpening et theH n I have shoWn the n'cuttingteeth Y10b of Figure 9 provided WithY that the friction betweenlthe teeth vand the. Y

sides ofthe cut is reduced tothe minimum. InjFigures 18 to 22,1 haveshown abrace 25 for stitl'ening or reinforcing the blade of the'satv.YThe brace consists of afpairoi' L-sections 26` and 27 secured, to eachother' at 28 for horizontal adjustment. The sections are preferablychanneled for.A rigidity and lightness as shown in Figure 19,. Thesesections 26V and 27 I.are `secured-at 29` to upri ghts 3()k and lvforvertical adjustment, the uprights sliding inrthe vchannel of ,theIsectionsvas shown in VFigure 19. Upright 30 is secured to one end ofblade 1 and upright i 31 is secured to a tab 32 xed to al Wooden rod 33rigid with a handle 34. Handle 34 is secured to the other end of the sawblade in any suitable manner such as by a loop rod passing through thehandle and connected to the saw in the usual manner.

In Figures 2B and 24e, I have shown the handle 34 provided with means 36extended from its top, for connecting it to the saw, as shown at 37.

i saw constructed as above set forth will cut faster because the groups2 of cutting teeth are provided with four cutting edges ou each toothand the teeth converge toward their points, thus allowing a. largenumber of cutting edges to be made on a blade. The sharpening of theteeth is facilitated by providing the slits 8 with a. filler so that thecorner of the file which is the most ineffective part will not have tocut a hard substance, thereby preventing files from being worn at thecorners and saving time and expense in sharpening the teeth. Byproviding the raker teeth at an incline to a lateral vertical planeperpendicular to the length of the blade, thesaw dust which accummulatesbetween the raker and cutting teeth will not stay packed but will beforced out by the vibrations of the saw after the teeth leave the cut.By providing the cutting teeth with grooves in their opposite edges,four cutting edges are produced on each tooth, thus increasing thenumber of cutting edges which makes the saw cut faster, doing away withthe constant setting of the teeth which is required on the ordinary saw,and keeping a permanent and accurate set of the teeth at all times.

IVhile I have described my invention as taking a particular form, itwill be under`- stood that the various parts may be changed withoutdeparting from the spirit thereof, and hence I do not limit myself tothe precise construction set forth, but consider that I am at liberty tomake such changes and alterations as fairly come within the scope of theappended claims.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is l. A saw having pointed cutting teethprovided with grooves in their opposite edges terminating at the point,and raker teeth between the cutting teeth.

2. A saw having pointed cutting teeth provided with V-shaped grooves intheir opposite edges terminating at the point, and raker teeth betweenthe cutting teeth.

3. A saw having groups of pointed cutting teeth provided with grooves intheir opposed edges terminating at the point; a filler within thegrooves, and raker tee-th between the groups.

4L. A saw having groups of converging cutting teeth, each of the cuttingteeth being pointed and provided with grooves in its opposite edgesterminating at the point, and raker teeth between the groups.

5. A saw including a blade provided with a pair of diverging raker teethhaving an opening in their shank, and cutting teeth between the rakerteeth and integrally connected therewith below the opening whereby whenthe cutting teeth are worn to the open* ing the raker teeth will retaintheir diverging shape.

6. A saw including a blade having teeth and slits leading into the bladefrom the opposed surfaces of the teeth, and a filler of softer materialthan the teeth in the slits whereby the opposed surfaces of the teethmay be easily sharpened.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

LOUIS DRAGON.

Witnesses EVELYN CRoMr'roN, CriAs. E. Porre.

